Tool handle



A. H. COLLINS Oct. 30, 1928.

TOOL HANDLE Filed Sept. 26, 1925 III!" Y N0 w. 7 NW r4 0 A L M m H a Q mm L E M m m m; u E g Q k 7 7 u K m Patented Oct. 30, 1928.-

UNITED STATES PATENT OFFICE. v

ANTHONY n. COLLINS, OF NEW YORK, ASSIGNOR To CHICAGO ZENEUMATIC TOOL COMPANY, or NEW YORK, N. Y., A CORPORATION 'OF NEWJERSEY.

TOOL HANDLE.

Application filedSeptcmberZG,1925. Serial 531723.

The present invention relates to control handles for fluid pressure tools of the. hand operated or portable type such as-drills, riveting and chipping hammers, etc. One object of theinven-tion is to provide'ahandle device of the type described which will enable the operator of the tool in a convenient manner to exert heavy pressure on the tool and to sustain the reaction thereof without discomfort. p a j s a s .ward extremity of handle A, carries a push Other objects will be apparent from the detailed description which follows:

In order to illustrate the invention one concrete embodiment thereof is. shown in the ac companying drawings, in which Fig. 1 is a side elcvational view of a pneumatic tool equipped with the control handle;

Fig. 2 is a longitudinal sectional view on an enlarged scale of the control handle alone; and

Fig. 3 is a right end elevational view of the handle on the scale of Fig. 2.

In Fig. 1 the control handle A is shown.

as secured to the cylinder of a pneumatic tool 13 with the tool ready for operation. The control handle A, as clearly indicated comprises the grip portion a and the tool attaching portion at, these portions: being in alignment. The tool attaching portion a provides a socket to receive the cylinder of the pneumatic tool to which it may be suitably attached, as by screw threads 1, and may have a toothed edge 5 to cooperate with the usual locking ring Z) and retaining clip I) (Fig. 1).

The grip portion a has'an axial bore 6 ex tending partially therethrough from the end opposite to the tool attaching portion a and has a counterbore 7 to receive the control valve for the pressure fluid which enters the handle through a bore 8 in a lateral projection 9 to which the air hose connection 10 is made the pressure fluid admitted being arranged to pass into the socket of the tool attaching portion a through a bore 11. The pressure fluid control means may comprise a bushing 12 having a press fit in counterbore 7 and provided with an external groove 13 arranged to register with bore 8, which groove communicates with the central bore 12 by ports 14. A throttle valve slidably mounted in bore 12 controls ports 14 and cooperates with a seat 12 adjacent the reduced bore 12 of the bushing into which a reduced portion 15 of the valve 15 may extend- T e al e i a ra g d t be forced manual control lever 17 pivoted at 17 a and having its thumbplate 1.7 disposed adjacent the tool. attachingportion a of the handle.

:Valve 15 is urged. against its ,seat by a coiled spr ng 18 which seats in a recess in plug member 19 closing bore 17 of the handle.

Plug member 19, which forms the rearplate 20 mounted substantially on the axis of the handle. Push platel20 is arranged for universal angular adjustment by the ,provision of a ball member 21 secured thereto as by rivet 20;- which ball member seats in socket 19 of plug member .19.

In operating a pneumatic tool equipped with the improved control handle the operator grasps the grip portion a and controls the pressure fluid with his thumb on the control lever 17. His other hand may grasp the cyl inder of the pneumatic tool. When he wishes to exert great pressure in forcing the tool to the work he utilizes the push plate 20 by pressing a portion of his body thereagainst, as his chest or his knee. Since the push plate 20 is universally adjustable by means of its ball and socket connection and since it presents a substantially flat surface of considerable extent, the operator can apply heavy pressure in the manner described for long periods with a minimum of discomfort. The mounting of the push plate on the longitudinal axis of the handle insures the maximum effect from the pressure so applied and little or p0 interference with the directing of the too I claim as my invention:

1. A control handle for fluid pressure tools having a hollow grip portion providing a bore for pressure fluid, a manually operable control valve for the pressure fluid within said hollow portion, and a plug member carrying a push plate closing the bore of said hollow portion.

2. A control handle for fluid pressure tools having a hollow grip portion providing a bore for pressure fluid; a manually operable control valve for the pressure fluid within said hollow portion, a plug member closing the bore of said hollow portion, and a push plate mounted on said member for universal adjustment.

3. A control handle for fluid pressure tools having a grip portion and a tool attaching portion in ali nment, said grip portion having an axial ore, a valve Within said bore for the pressure fluid, a manual control lever for said valve disposed on said grip portion adjacent thetool attaching end, and a plug member closing said bore and carrying a push plate. i

4. I control handle for fluid pressure tools having a. grip portion and a tool attaching portion in alignment, said grip portion having an axial bore, avalve Within said bore for the pressure fluid, a manual control lever for said valve disposed on said grip portion adjacent the tool attaching end, a plug member closing said bore, and a push plate'adj ustably secured to said member by a ball and socket connection substantially on the longitudinal axis of the handle. V

5. A control handle for fluid pressure tools having a grip portion and a tool attaching portion in alignment, said grip portion having an axial bore, a bushing Within said bore,

'a valve slidable Within said bushing, a spring engaging saidvalve yieldingly to hold it in jacent the tool attaching end, a plug member closing said bore and providing a socketed abutment for said spring, and a push plate permanently mounted for universal movement on said plug on the longitudinal axis of the handle.

6. A control handle for fluid pressure tools having a grip portion and a tool attaching portion in allgnment, said grip portion having a bore, a bushing Within said bore, a throttle valve slidable within said bushing, resilient means engaging said valve yieldingly to hold it in closed position, a manual control lever for said valve disposed on said grip portion adjacent the tool attaching end, a plug member engaging said bushing and closing said bore, and a push plate on said plug member having a ball and socket connection with the latter.

Signed by me at New York, N. Y., this 25th day of September, 1925.

Y ANTHONY H. COLLINS. 

